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Thiourea modified hyper‐crosslinked polystyrene resin for heavy metal ions removal from aqueous solutions
Author(s) -
Yang Zujin,
Huang Xiaonan,
Yao Xingdong,
Ji Hongbing
Publication year - 2018
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.45568
Subject(s) - adsorption , aqueous solution , thiourea , metal ions in aqueous solution , langmuir adsorption model , polystyrene , metal , materials science , x ray photoelectron spectroscopy , chemistry , fourier transform infrared spectroscopy , nuclear chemistry , inorganic chemistry , polymer chemistry , chemical engineering , organic chemistry , polymer , engineering
A hyper‐crosslinked resin chemically modified with thiourea (TM‐HPS) was synthesized, characterized, and evaluated for the removal of heavy metal ions (Pb 2+ , Cd 2+ , and Cu 2+ ) from aqueous solutions. The structural characterization results showed that a few thiourea groups were grafted on the surface of the resin with a big BET surface area and a large number of narrow micropores. Various experimental conditions such as pH, contact time, temperature, and initial metal concentration of the three heavy metal ions onto TM‐HPS were investigated systematically. The results indicated that the prepared resin was effective for the removal of the heavy metal ions from aqueous solutions. The isotherm data could be better fitted by Langmuir model, yielding maximum adsorption capacities of 689.65, 432.90, and 290.69 mg/g for Pd 2+ , Cd 2+ , and Cu 2+ , respectively. And the adsorption kinetics of the three metal ions followed the pseudo‐second‐order equation. FTIR and XPS analysis of TM‐HPS before and after adsorption further revealed that the adsorption mechanism could be a synergistic effect between functional groups and metal ions and electrostatic attraction, which may provide a new insight into the design of highly effective adsorbents and their potential technological applications for the removal of heavy metal ions from aqueous solutions. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018 , 135 , 45568.